'Sesquialtera' definitions:

Definition of 'Sesquialtera'

From: GCIDE

Sesquialter \Ses`qui*al"ter\, Sesquialtera \Ses`qui*al"ter*a\, n. [NL. sesquialtera.] (Mus.) A stop on the organ, containing several ranks of pipes which reenforce some of the high harmonics of the ground tone, and make the sound more brilliant. [1913 Webster] Sesquialteral